Burglar-alarm



RICHARD TEIOHMANN, OF BROOKLYN, NEW YORK.

URGLAR ALARlVl.

SPECIFICATION forming part of Letters Patent No. 391,724, dated October23,1888.

Application filed December 9, 1887. Serial No. 257,417. (No model.)

To aZZ whom it may concern.-

Be it known that I, RICHARD TEIOHMANN, of Brooklyn, in the county ofKings and State of New York, have invented certain new and usefulImprovements-in Burglar-Alarms, of which the following is aspecification.

This invention relates to an improved burglar-alarm that is operated bythe turning of the knob and either applied to the door or made portable,the alarm being of simple, cheap, and effective construction; and theinvention consists of a burglaralarm that comprises a bell, a fixedspindle, a sleeve mounted on said spindle, a spiral spring attached tothe spindle and sleeve, a clapper pivoted to an eye of the sleeve, astring which is wound around the sleeve and provided at the opposite endWith'a hook, so that by pulling the hook the string is unwound and thespring set to tension, while when the hook is released the return of thespring to its normal position turns the sleeve, operating the clapper inturning the sleeve so as to ring the bell.

In the accompanying drawings, Figures 1 and 2 represent two differentmodifications of my improved burglaralarm, shown as applied for use.Figs. 3 and 4 represent, respectively, a front elevation with a partbroken away and a vertical transverse section of the alarm shown in Fig.l; and Fig. 5 is a vertical transverse section of the alarm shown inFig. 2.

Similar letters of reference indicate corresponding parts.

My improved burglar-alarm may either be used by being permanentlyattached to the door or door-casing or by being made portable, so as tobe carried along in the trunk in traveling. The main elements employedin the construction of the alarm are the same in both constructions.

The alarm consists of a bell, a, that is mounted on a frame, or directlyattached to a spindle, b, as shown in Fig. 8. The spindle b is eithermounted on a base piece, 0, which is screwed to the door-casing, asshown in Figs.

1 and 3, or directly to the door by means of a threaded shank,screw-nut, andjam-nut, as shown in Fig. 5. On the spindle b is mounted acylindrical sleeve, d, between which and the spindle is arranged aspiral spring, 6, one end .of which is attached to the spindle, whilethe other end is attached to the sleeve, as shown in the drawings. Tothe sleeve 62 is applied, by means of a fixed eye, cl, aloosely-swinging clapper, e, which strikes the bell quickly when 5 5 thesleeve rotates on the spindle. A string, f,

is attached at one end to the sleeve and wound around the same andprovided at its outer end with a wire hook, f. The string fis guidedeither by a suitable eye or by a hole in the 60 body of the bell.

The alarm may be used in different ways, either by attaching itpermanently to the door or other point of support or by placing it onthe floor, pulling out the setting string, and 6 applying the hook tothe door-knob in such a manner that by the least turning of the knob thehook slips oft and permits the spring to turn the sleeve, rewind thestring, and ring the hell. In this manner a stationary or portable cburglaralarm of simple, cheap, and effective construction is obtained,which can be readily set in position for use, and which resets itself bythe simple act of pulling the string into the required position withoutthe use ofa windingkey or other device.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination ofabell, a fixed spindle, a rotaryand spring-actuated sleeve mounted SC on said spindle, a clapper hung toan eye of the sleeve, a settingstring attached to the sleeve, andasetting-hook applied to the outer end of the string, said setting-hookbeing adapted to engage the knob of the door and 8 release it when theknob is turned, substantially as set forth.

2. The combination of a hell, a spindle, a loose sleeve on said spindle,a spiral spring connected to the spindle and sleeve, a clapper 0 appliedto an eye of the sleeve, a setting-string attached. to the sleeve, and asetting'hook attached to the outer end or" the cord, said setting-hookbeing adapted to engage the knob of adoor and release it when the knobis turned, 5 substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.

RICHARD TEIOHMANN.

Witnesses:

PAUL GOEPEL, J oHN- A. STRALEY.

